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41
Which of the following devices is based on the phenomenon of electromagnetic induction?
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Answer: Option D
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42
. . . . . . . . states that the total current entering a junction is equal to the total current leaving the junction.
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Answer: Option D
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43
The torque on a rectangular coil placed in uniform magnetic field is large when the
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Answer: Option A
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44
An electric washing machine of 750 W is used for 4 hours per day. Energy consumed by the machine in one day is . . . . . . . .
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Answer: Option A
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45
In an electric circuit, flow of electric current is due to . . . . . . . .
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Answer: Option A
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46
At low temperature, lead behaves as a
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Answer: Option B
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47
What is the resistance (in Ω) of an electrical component if a current of 0.2A passes through it on application of 8 V of potential difference across it?
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Answer: Option A
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48
Factors affecting resistance of matter:
1. Temperature
2. Nature of substance
3. Conductor length
4. Area of transverse passage
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Answer: Option A
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49
Electricity is produced through dry cell from
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Answer: Option A
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50
According to the Joule's law of heat, the heat generated in a circuit depends on some factors. Which of the following can be charged in this?
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Answer: Option B
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