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12th Odisha Board
IMPORTANT
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When the temperature of a metallic conductor increases, its resistance decreases.

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Important Questions on Electric Current

EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 6
Ohm's law is applicable to all conductors of electricity.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 7
The resistance of an incandescent lamp is greater when the lamp is switched on.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 1
Increasing the potential difference between the ends of a conductor results in increase in  _____.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 2
Two identical metal wires have their lengths in the ratio 2:3. Their resistance shall be in the ratio _____.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 3
Temperature coefficient of resistance is nearly zero for _____. (Choose from Constantan, copper)
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 4
The dimension of electric potential difference is [ML2TxA-1]. The value of x is _____.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 5
The relation between current density (J), conductivity (σ) and electric field strength (E) is _____=σE .
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 7
The expression for conductivity in terms of J and E is _____.