Tag: precaution with the electrical circuit

Questions Related to precaution with the electrical circuit

Why one should never touch electrical appliance with wet hand?

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Wet body is bad conductor

  2. Wet body is good conductor

  3. Both of these

  4. None of these

Show answer
Correct Option: B
Explanation:

Never touch any electrical appliance with wet hands. Wet body can act as a good conductor of electricity. In case of any leakage the person with wet hands will get shock.

The effect of current on which the use of a fuse is based is

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Magnetic effect

  2. Chemical effect

  3. Heating effect

  4. Induction effect

Show answer
Correct Option: C
Explanation:

Heating effect of current is used in fuse.

Which of the following are correct safety precautions to be taken while using electricity?

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Don't yank an electrical cord from the wall.

  2. Fly your kite far away from power lines or substations.

  3. Do look up and look out for power lines before you climb a tree.

  4. All of these

Show answer
Correct Option: D
Explanation:
Some precaution to be taken while using electricity:
1. DON'T plug a bunch of stuff into one outlet or extension cord.
It could damage the electrical system in your house or even cause a fire.
2. DO ask grown-ups to put safety caps on all unused electrical outlets.
Covering outlets will also help save energy by stopping cold drafts.
3. DON’T yank an electrical cord from the wall.
Pulling on a cord can damage the appliance, the plug or the outlet.
4. DO make sure all electric cords are tucked away, neat and tidy.
Pets might chew on electrical cords, and people might trip and fall.
5. DON'T ever climb the fence around an electrical substation.
If a ball or pet gets inside the fence, ask a grown-up to call the electric company - they'll come and get it out for you.
6. DO look up and look out for power lines before you climb a tree.
The electricity can go right through the tree branch - and right through you!
7. DON’T fly a kite near power lines.
The kite and the string may conduct electricity – sending it right through you to the ground.

Identify correct option safety precaution while using electricity

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Don't plug a bunch of stuff into one outlet or extension cord.

  2. Make sure all electric cords are tucked away, neat and tidy.

  3. Don't ever climb the fence around an electrical substation.

  4. All of these

Show answer
Correct Option: D
Explanation:
Some precaution to be taken while using electricity:
1. DON'T plug a bunch of stuff into one outlet or extension cord.
It could damage the electrical system in your house or even cause a fire.
2. DO ask grown-ups to put safety caps on all unused electrical outlets.
Covering outlets will also help save energy by stopping cold drafts.

3. DON’T yank an electrical cord from the wall.
Pulling on a cord can damage the appliance, the plug or the outlet.

4. DO make sure all electric cords are tucked away, neat and tidy.
Pets might chew on electrical cords, and people might trip and fall.

5. DON'T ever climb the fence around an electrical substation.
If a ball or pet gets inside the fence, ask a grown-up to call the electric company - they'll come and get it out for you.

Major dangers while using electricity are/is

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Fire

  2. An electric shock

  3. Both

  4. None

Show answer
Correct Option: C
Explanation:
There are two majors dangers while using electricity.they are 
A) Fire 
B) An electric shock.
A fire is caused due to overheating of line wired (or cable) for various reasons such as break if insulation or short-circuiting, etc to avoid it ,one must use wires (or cables) of current carrying capacity higher than the total current which can flow through the circuit when using all the appliances at the same time. An electric shock may be caused from an appliance due to 
i) Poor insulation of wires,
ii) Touching the appliances with wet hands and 
iii) No earthing of the appliance.
To avoid it, the insulation of wires must be of good quality and it should be checked from time to time particularly when they become old, so that no wire is left naked the appliance should never be operated (or touched) with wet hands and they should always be kept dry. The appliances must have its metallic case earthed the appliances must be provided with a fuse.

+ Solution

Which of the following are safety precautions to be taken while using electricity. Select correct option

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Avoid water at all times when working with electricity

  2. Never use equipment with frayed cords, damaged insulation or broken plugs

  3. Always use insulated tools while working.

  4. All of these

Show answer
Correct Option: D
Explanation:

water can damage the circuits. it can also create a short circuit which may result into serious accidents. If insulation is damaged, then our body may come into direct contact with the electric current, resulting in an electric shock. Insulation is thus compulsory while working with electricity.

Mark the incorrect option

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. The appliances must have its metallic case earthed

  2. The appliances must be provided with a fuse

  3. The appliance should always operated(or touched)with wet hands

  4. All

Show answer
Correct Option: C
Explanation:

Touching an appliance with wet hands can cause an electric shock, thus option C is the incorrect statement.

Following are some precaution to be taken while using electricity given as options. Mark most appropriate one.

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Have a grown-up put safety caps on all unused electrical outlets.

  2. Remind your mom or dad to watch out for power lines

  3. Keep electrical stuff far away from water.

  4. All of these

Show answer
Correct Option: D
Explanation:
Some precaution to be taken while using electricity:
1. DON'T plug a bunch of stuff into one outlet or extension cord.
It could damage the electrical system in your house or even cause a fire.
2. DO ask grown-ups to put safety caps on all unused electrical outlets.
Covering outlets will also help save energy by stopping cold drafts.
3. DON’T yank an electrical cord from the wall.
Pulling on a cord can damage the appliance, the plug or the outlet.
4. DO make sure all electric cords are tucked away, neat and tidy.
Pets might chew on electrical cords, and people might trip and fall.
5. DON'T ever climb the fence around an electrical substation.
If a ball or pet gets inside the fence, ask a grown-up to call the electric company - they'll come and get it out for you.
6. DO look up and look out for power lines before you climb a tree.
The electricity can go right through the tree branch - and right through you!
7. DON’T fly a kite near power lines.
The kite and the string may conduct electricity – sending it right through you to the ground.

An electric shock may be caused by

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Poor insulation of wires.

  2. Touching the appliances with wet hands.

  3. No earthing of the appliance.

  4. All

Show answer
Correct Option: D
Explanation:

An electric shock may be caused from an appliance due to 
i) Poor insulation of wires,
ii) Touching the appliances with wet hands and 
iii) No earthing of the appliance.
To avoid it,the insulation of wires must be of good quality and it should be checked from time to time particularly when they become old,so that no wire is left naked the appliance should never be operated(or touched)with wet hands and they should always be kept dry.the appliances must have its metallic case earthed the appliances must be provided with a fuse.

A person can get an electric shock by touching it if the wire has poor insulation of rubber over it.
An electric shock may also be caused by touching the appliance that was either not earthed or touching it with wet hands.

Thus option D is correct.

Options contains safety precaution to be used while using electricity. Mark most appropriate one.

physics when current flows precaution with the electrical circuit precautions to be taken while dealing with current electrical safety devices used to protect from shock of electric current

  1. Treat all electrical devices as if they are live or energized

  2. Disconnect the power source before servicing or repairing electrical equipment.

  3. Use only tools and equipment with non-conducting handles when working on electrical devices.

  4. All of these

Show answer
Correct Option: D
Explanation:

Rules to follow when working with electricity:

  1. Treat all electrical devices as if they are live or energized. You never know.
  2. Disconnect the power source before servicing or repairing electrical equipment. The only way to be sure.
  3. Use only tools and equipment with non-conducting handles when working on electrical devices. Easy to check.