10th Standard Science Chapter 12 Quiz

Created on November 26, 2020 By

wefru

10th Standard Science Chapter 12

TEST YOUR SKILLS

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Question 1.
Which of the following represents voltage?

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Question 2.
Unit of electric power may also be expressed as

(a) volt ampere

(b) kilowatt hour

d) Joule second

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Q3. When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:

(a) 0.5

(b) 1

(d) 4

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Q4. Keeping the potential difference constant, the resistance of the circuit is halved. The current will become:

(a) One-fourth

(b) Four times

(d) Double

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Q5. If in the given arrangement, the three resistors are to be replaced by a single resistor. What will be the value of this resistor?

sci ch12 image1

(a) 4Ω

(b) 6Ω

(d) 18Ω

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Q6. The potential difference across the 3 Ω resistor in the following diagram is:

(a) 1/9 V

(b) 1/2 V

(d) 1V

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Q6. The potential difference across the 3 Ω resistor in the following diagram is:

(a) 1/9 V

(b) 1/2 V

(d) 1V

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Q7. V₁, V₂ and V₃ are the potential differences across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A.

sci ch12 image3

Which of the following shows the correct values of V₁, V₂ and V₃ measured in volts?

(a) V1 =1, V2 = 2 and V3 = 3

(b) V1 =5, V2 = 10 and V3 = 15

(d) V1 =4, V2 = 3 and V3 = 2

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Q8. A wire of resistance R₁ is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R₂, then the ratio R₁/ R₂ is:

(a) 1/25

(b) 1/5

(d) 25

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Q10. When a current 'I' flows through a resistance 'R' for time 't' the electrical energy spent is given by

(a) IRt

(b) I2Rt

(d) I2R/t

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