The essential difference between an AC generator and a DC generator is that:

AC generator has slip rings while the DC generator has a commutator

AC generator has an electromagnet while a DC generator has permanent magnet

DC generator will generate a higher voltage

AC generator will generate a higher voltage

What is the role of the split ring in an electric motor?

Commutator or split ring changes the direction of current in the coil of the electric motor, after every half revolution. Note: Split ring is also known as commutator. The function of commutator rings is to reverse the direction of current flowing through the coil every time the coil just passes the vertical position during a revolution.

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10th CBSE

IMPORTANT

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Circuit Breaker Device which can be used in place of fuse in domestic electric wiring is called:

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Important Questions on Magnetic Effect of Electric Current

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10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Multiple Choice Questions (MCQs)>Q 37

An MCB which cuts off the electricity supply in case of short-circuiting or overloading works on the:

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10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Questions Based on High Order Thinking Skills (HOTS)>Q 38

An air-conditioner of

3.2 kW

power rating is connected to a domestic electric circuit having a current rating of

10 A

. The voltage of power supply is

220 V

. What will happen when this air-conditioner is switched on? Explain your answer.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Questions Based on High Order Thinking Skills (HOTS)>Q 39

Three appliances are connected in parallel to the same source which provides a voltage of

220 V

. A fuse connected to the source will blow if the current from the source exceeds

10 A

. If the three appliances are rated at

60 W, 500 W

and

1200 W

220 V

, will the fuse blow?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Questions Based on High Order Thinking Skills (HOTS)>Q 40

A vacuum cleaner draws a current of

2 A

from the mains supply. What is the appropriate value of the fuse to be fitted in its circuit?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Questions Based on High Order Thinking Skills (HOTS)>Q 40

A vacuum cleaner draws a current of

2 A

from the mains supply. What will happen if a

13 A

fuse is fitted in its circuit?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Questions Based on High Order Thinking Skills (HOTS)>Q 41

Which of the following circuits will still be dangerous even if the fuse blows off and electric iron stops working during a short-circuit?

(A) (B)

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Questions Based on High Order Thinking Skills (HOTS)>Q 42

An electric kettle rated as

1200 W a t 220 V

and a toaster rated as

1000 W a t 220 V

are both connected in parallel to a source of

220 V

. If the fuse connected to the source blows when the current exceeds

9.0 A

, can both appliances be used at the same time? Illustrate your answer with calculations.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 2 - Magnetic Effect of Electric Current>Questions Based on High Order Thinking Skills (HOTS)>Q 43

What is the main difference in the wiring of an electric bulb and a socket for using an electric iron in a domestic electric circuit? What is the reason for this difference?

Circuit Breaker Device which can be used in place of fuse in domestic electric wiring is called:

Important Questions on Magnetic Effect of Electric Current

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