Electricity and Magnetism MCQ question and answer with solution

41

When you walk on a woolen carpet and bring your finger near the metallic handle of a door, an electric shock is produced. This is because

A) charge is transferred from your body to the handle B) a chemical reaction occurs when you touch the handle C) the temperature of the human body is higher than that of the handle D) the human body and the handle arrive at thermal equilibrium by the process

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Answer & Solution

Answer: Option A

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42

. . . . . . . . across the ends of a resistance is directly proportional to the current flowing throught it, provided its temperature remains the same.

A) resistance B) Passion C) Resistivity D) Potential difference

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Answer & Solution

Answer: Option D

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43

If the three resistors of 10 Ω, 8 Ω and 7 Ω are connected in series order, then the effective resistance in the circuit will be . . . . . . .

A) 25 Pa B) 25 N C) 25 J D) 25 Ω

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Answer & Solution

Answer: Option D

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44

The device which works on the principle of electromagnetic induction is

A) Ammeter B) Voltmeter C) Dynamo D) None of these

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Answer & Solution

Answer: Option C

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45

Which of the following is not true about electromagnetic?

A) It is a temporary magnet B) its capacity varies between its poles C) cannot be polarized D) Its capacity can be changed

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Answer & Solution

Answer: Option C

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46

Resistance (R) = Voltage (V) / . . . . . . . .

A) Current B) Work C) Charge D) Power

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Answer & Solution

Answer: Option A

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47

The electric motor transforms . . . . . . . .

A) Mechanical energy into electrical energy B) Thermal energy into electrical energy C) Electrical energy into mechanical energy D) Radiation energy into electrical energy

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Answer & Solution

Answer: Option C

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48

A permanent magnet repels

A) ferromagnetic substances only B) diamagnetic substances only C) paramagnetic substances only D) Both B and C

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Answer & Solution

Answer: Option B

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49

The value of electromotive force (ε) is equal to-

A) $$\varepsilon = \frac{Q}{t}$$ B) $$\varepsilon = \frac{W}{Q}$$ C) $$\varepsilon = \frac{E}{Q}$$ D) $$\varepsilon = \frac{P}{Q}$$

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Answer & Solution

Answer: Option B

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50

The fuse in an electric circuit is connected in

A) series with neutral B) parallel to live C) parallel to neutral D) series with live

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Answer & Solution

Answer: Option D

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Electricity and Magnetism MCQ question and answer with solution | Physics Gk MCQs