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Two wires of resistance 10 Omega and 5 O...

Two wires of resistance `10 Omega` and `5 Omega` are connected in series. The effective resistance is `"__________"` Omega`.

A

15

B

20

C

30

D

40

Text Solution

Verified by Experts

The correct Answer is:
A
`R = R_(1) +R_(2) = 10 Omega + 5Omega = 15 Omega`.
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Knowledge Check

  • Two resistors of resistances R_(1)=(300+-3) Omega and R_(2)=(500+-4) Omega are connected in series. The equivalent resistance of the series combination is

    A
    `(800+-1)Omega`
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  • Two wires have resistance of 2 Omega and 4 Omega connected to same voltage, ratio of heat dissipated at resistance is

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    `4 : 3`
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  • Two resistance of 400 Omega and 800 Omega are connected in series withh 6V battery of negligible internal resistance. A voltmeter of resistance 10,000 Omega is used to measure the p.d. across 400 Omega . The error in the measurnment of p.d. in volts approximately

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    0.05 V
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    0.75 V
    D
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