CURRENT ELECTRICITY

Numerical No:    14.1   14.2   14.3   14.4   14.5   14.6   14.7   14.8   14.9   14.10
   14.11

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NUMERICAL NO: 14.1

A current of 3 mA flowing through a wire for 1min. What is the charge flowing through the wire?

SOLUTION...

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NUMERICAL NO: 14.2

At 100,000 Ω, how much current flows through body if you touch the terminals of 12 V battery? If your skin wet, so that your resistance is only 1000 Ω, how much current would you resist from the same battery?

SOLUTION...

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NUMERICAL NO: 14.3

The resistance of a conductor wire is 10 MΩ. If a potential difference of 100 volt is applied across its ends, then find the value of current passing through it in mA.

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NUMERICAL NO: 14.4

By applying a potential difference of 10 Volt across a conductor, a current of 1.5 A passes through it. How much energy would be obtained from the current in 2 minutes?

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NUMERICAL NO: 14.5

Two transistors 0f 2 kΩ and 8 kΩ are joined in series, if a 10 V0lt battery is connected across the ends of this combination, find the following quantities:
    a.    Equivalent resistance of the series combination
    b.    Current passing through each of the resistances
    c.    The potential difference across each resistance

SOLUTION...

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NUMERICAL NO: 14.6

Two transistors 0f 6 kΩ and 12 kΩ are joined in parallel, if a 6 V0lt battery is connected across the ends of this combination, find the following quantities:
    a.    Equivalent resistance of the parallel combination
    b.    Current passing through each of the resistances
    c.    The potential difference across each resistance

SOLUTION...

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NUMERICAL NO: 14.7

An electric bulb is marked with 220 V, 100 W. Find the resistance of the filament of the bulb. If the bulb is used 5 hour daily, find the energy in kilowatt-hour consumed by the bulb in one month (30 days).

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NUMERICAL NO: 14.8

An incandescent light bulb with an operating resistance of 95 Ω is labeled 150 W. is this bulb designed for use in a 120V circuit or a 220 V circuit.

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NUMERICAL NO: 14.9

A house is installed with
    a.    10 bulbs of 60 W each of which are used 5 hour daily
    b.    4 fans of 75 W each of which run 10 hours daily
    c.   One T.V. of 250 W which is used for 2 hours daily
    d.   One electric iron of 1000 W which is used for 2 hours daily
If the cost of 1 unit of electricity is Rs. 4, find the monthly expenditure of electricity (1 month = 30 days).

SOLUTION...

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NUMERICAL NO: 14.10

A 100 W lamp bulb and a 4 kW water heater are connected to a 250 V supply. Calculate
    a.    The current which flows in each appliance
    b.    The resistance of each appliance when in use.

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NUMERICAL NO: 14.11

A resistor of resistance 5.6 Ω is connected across a battery of 3.0 V by means of wire of negligible resistance. A current of 0.5 A passes through the resistor. Calculate
    a.    Power dissipated in the resistor
    b.    Total power produced by the battery
    c.    Give the reason of difference between these two quantities

SOLUTION...

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