Three resistors: R: = 3, Rz = 62, and R. = 90 are connected in series to each other and to a

36 V battery. What is the ammeter reading

after the switch is closed?

A. 6A B. SA C. 4 A

D. 3 A E. 2 A

Answer: Option C) 4A

Explanation:

Three resistors: R: = 3

Rz = 62

R. = 90

For total resistance for series connection

Rtotal = R + Rz + R.

Rtotal = 3 + 62 + 90 = 155 ohms

Voltage of battery = 36 Volts

Current = ? (Since ammeter measures current and the reading is not provided)

Now apply the formula:

Voltage = Current x Resistance

V = IR

36V = I x 155 ohms

I = 155 ohms/36V

I = 4.3 ampere (rounded to nearest tenth as 4 ampere)

Thus, the ammeter read 4 ampere after the switch is closed