Question

Read the following and answer the following questions.

Two electric circuits are shown below. The batteries used in circuit 1 and circuit 2 are identical. In circuit 1, the ammeter reads 1.2 A when the switch is closed. The two switches in circuit 2 are closed. When the switches are closed in circuit 2, ammeter 1 reads 6A and ammeter 2 reads 3A.

(a) The reading of voltmeter in circuit 1 is
i.) 10V

ii.) 14V

iii.) 18V

iv.) 20V

(b)The combined resistance of the two resistors in circuit 2 is

i) 20 ohm

ii.) 3.3 ohm

iii.) 4 ohm

iv.) 5.2 ohm

A student draws the circuit diagram as shown. The parts labeled XY and Z respectively are
1.) Ammeter, resistor, voltmeter

ii.) Ammeter, voltmeter, resistor

iii.) Voltmeter, resistor, ammeter

iv.) Voltmeter, ammeter, resistor

The resistance of an electrical component remains constant, while the potential difference across the two ends of the component decreases to half of its former value. The final current will become

i) 1/4 of its initial value

ii.) 1/2 of its initial value

iii.) Same as the initial value

iv.) Double of its initial value​

Answer 1

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