Electricity

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Electricity

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About this quiz :

Series name : Boostup
Class : 10th
Subject : science { Physics }
Syllabus : Electricity
Total questions : 15
Total marks : 15

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The potential difference across the 3 Ω resistor is:

1 point

(a) 1/9 V

(b) 1/2 V

(d) 1V

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1 point

(a) 6 Ω, 3 Ω and 9 Ω are in series

(b) 9 Ω and 6 Ω are in parallel and the combination is in series with 3 Ω

(d) 3 Ω and 6 Ω are in parallel and the combination is in series with 9 Ω

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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:

1 point

(a) 0.5

(b) 1

(d) 4

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Two appliances of rating 200 watt-250 volts and 100 watt-250 volts are joined in series to a 250 volts supply. Total power consumed in the circuit is

1 point

(a) 46 watt

(b) 67 watt

(d) 30 watt

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1 point

(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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If the current flowing through a fixed resistor is halved, the heat produced in it will become:

1 point

(a) One-fourth

(b) One-half

(d) Four times

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Two electric bulbs have resistances in the ratio 1:2. If they are joined in series, the energy consumed in them is in the ratio.

1 point

(a) 2:1

(b) 1:2

(d) 1:1

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

1 point

(a) 4Ω

(b) 6Ω

(d) 18Ω

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

1 point

(a) One-fourth

(b) Four times

(d) Double

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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:

1 point

(a) 1/25

(b) 1/5

(d) 25

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You are given four ammeters A, B, C and D having least counts mentioned below: (I) Ammeter A with least count 0.25 A (II) Ammeter B with least count 0.5 A (III) Ammeter C with least count 0.05 A (IV) Ammeter D with least count 0.1 A Which of the ammeters would you prefer for doing an experiment to determine the equivalent resistance of two resistances most accurately, when connected in parallel?

1 point

(a) Ammeter A

(b) Ammeter B

(d) Ammeter D

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

1 point

(a) IRt

(b) I2Rt

(d) I2R/t

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What is the amount of current flowing through an electric press, if the amount of charge passing through a conductor in 10 minutes is 300 C?

1 point

(a) 30 A

(b) 0.3 A

(d) 5 A

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An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:

1 point

(a) 0.92 A

(b) 2.9 A

(d) 92 A

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At a given time, a house is supplied with 100 A at 220 V. How many 75 W, 220 V light bulbs could be switched on in the house at the same time (if they are all connected in parallel)?

1 point

(a) 93

(b) 193

(d) 393

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