Question

A student is making his science Project. He purchased four cells, an ammeter and three resistors for his project. In his project, four cells of 2V are connected in series. The combination in series is joined to an ammeter of negligible resistance, a 1.6ohm resistor, a 0.4ohm resistor, and an unknown resistor R1 as shown in figure. The current in the circuit is 2A.

i. What is the total electromotive force of the circuit?

a) 2 V b) 4 V c) 8 V d) 6 V

ii. What is the value of R1?

a) 1 Ω b) 2 Ω c) 4 Ω d) 6 Ω

iii. What is the value of potential difference across R1?

a) 4V b) 2 V c) 8 V d) 12 V

iv. Calculate the total resistance of the circuit.

a) 3.75 Ω b) 3.125 Ω c) 3.5 Ω d) 4 Ω

v. Find the value of current across resistance 0.4 Ω.

a) 7.5 A b) 2 A c) 3.5 A d) 0.8 A​

Answer 1

Explanation:

djgjfkhjhidogyhidoguhuj