(B1) (14/10/24) Current Electricity

1. Which of the following quantity must remain constant for measurement of resistance ?

• Temperature .
• Area
• Length
• All of the above .

Two unequal resistances are connected in parallel by a student . Which of the following is true ?

• Currecnt is same in both .
• Current is larger in higher resistance .
• Voltage drop is same across both .
• Voltage drop is lower in lower resistance .

3. I. The resistors R1 and R2 have not been correctly connected in parallel . II. The voltmeter has not been correctly connected in the circuit . III. The ammeter and the key have not been correctly connected in the circuit . out of this three the actual fault in this circuit is / are

• Both I and II
• Both II and III
• Only I
• Only II

When a current I flows through a wire of resistance R for time t , then the electrical energy produced is given by

• I2 Rt
• IR2 t
• IRt
• IRt2

In the series combination of resistances

• Potential difference is same across each resistance .
• Total resistance is reduced .
• Current is same in each resistance
• All of the above