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

Question

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

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Thông Đạt 5 years 2021-08-10T00:25:11+00:00 1 Answers 22 views 0

Answers ( )

  1. yenoanh
    0
    2021-08-10T00:26:18+00:00
    Reply

    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

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