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Physics-

General

Easy

Question

In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If $240 blank V$ is applied on the primary coil, then the ratio of current in primary and secondary coil is

4:5
5:4
5:9
9:5

The correct answer is: 4:5

$fraction numerator N subscript s end subscript over denominator N subscript p end subscript end fraction equals fraction numerator i subscript p end subscript over denominator i subscript s end subscript end fraction rightwards double arrow fraction numerator i subscript p end subscript over denominator i subscript s end subscript end fraction equals fraction numerator 4 over denominator 5 end fraction$

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An inductor $left parenthesis L equals 100 blank m H right parenthesis$ , a resistor $left parenthesis R equals 100 capital omega right parenthesis$ and a battery $left parenthesis E equals 100 V right parenthesis$ are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit $1 blank m s$ after the short circuit is

An inductor $left parenthesis L equals 100 blank m H right parenthesis$ , a resistor $left parenthesis R equals 100 capital omega right parenthesis$ and a battery $left parenthesis E equals 100 V right parenthesis$ are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit $1 blank m s$ after the short circuit is
Physics-General

An e.m.f. of $5 blank v o l t$ is produced by a self inductance, when the current changes at a steady rate from $3 blank A$ to $2 blank A$ in 1 millisecond. The value of self inductance is

An e.m.f. of $5 blank v o l t$ is produced by a self inductance, when the current changes at a steady rate from $3 blank A$ to $2 blank A$ in 1 millisecond. The value of self inductance is

Physics-General

Name the hardest material present in the body?

Name the hardest material present in the body?

parallel

In step-up transformer, relation between number of turns in primary $left parenthesis N subscript p end subscript right parenthesis$ and number of turns is secondary $left parenthesis N subscript s end subscript right parenthesis$ coils is

In step-up transformer, relation between number of turns in primary $left parenthesis N subscript p end subscript right parenthesis$ and number of turns is secondary $left parenthesis N subscript s end subscript right parenthesis$ coils is

Physics-General

An inductor of inductance $L equals 400 m H$ and resistors of resistances $R subscript 1 end subscript equals 2 capital omega$ and $R subscript 2 end subscript equals 2 capital omega$ are connected to a battery of $e m f blank 12 V$ as shown in the figure. The internal resistance of the battery is negligible. The switch $S$ is closed at $t equals 0$ . The potential drop across $L$ as a function of time is

An inductor of inductance $L equals 400 m H$ and resistors of resistances $R subscript 1 end subscript equals 2 capital omega$ and $R subscript 2 end subscript equals 2 capital omega$ are connected to a battery of $e m f blank 12 V$ as shown in the figure. The internal resistance of the battery is negligible. The switch $S$ is closed at $t equals 0$ . The potential drop across $L$ as a function of time is
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Name the largest part of the Alimentary canal?

Name the largest part of the Alimentary canal?

parallel

The half life period of a radioactive element is 140 days. After 560 days , 1g of element will be reduced to

The half life period of a radioactive element is 140 days. After 560 days , 1g of element will be reduced to

If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be competed in

If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be competed in

The rate constant of a reaction is 5.8 x 10-2 s^-1 . The order of the reaction is

The rate constant of a reaction is 5.8 x 10-2 s^-1 . The order of the reaction is

parallel

In a first order reaction x→ y; if k is the rate constant and the initial concentration of the reactant x is 0.1M, then, the half life is

In a first order reaction x→ y; if k is the rate constant and the initial concentration of the reactant x is 0.1M, then, the half life is

Four a first order reaction, the rate constant is 6.909 min^-1 the time taken for 75% convertion in minutes is

Four a first order reaction, the rate constant is 6.909 min^-1 the time taken for 75% convertion in minutes is

The turn ratio of a transformers is given as 2:3. If the current through the primary coil is $3 blank A$ , thus calculate the current through load resistance

The turn ratio of a transformers is given as 2:3. If the current through the primary coil is $3 blank A$ , thus calculate the current through load resistance

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parallel

In transformer, core is made of soft iron to reduce

In transformer, core is made of soft iron to reduce

Physics-General

When the current through a solenoid increases at a constant rate, the induced current

When the current through a solenoid increases at a constant rate, the induced current

Physics-General

An electric motor operates on a $50 blank v o l t$ supply and a current of $12 A$ . If the efficiency of the motor is 30%, what is the resistance of the winding of the motor

An electric motor operates on a $50 blank v o l t$ supply and a current of $12 A$ . If the efficiency of the motor is 30%, what is the resistance of the winding of the motor

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parallel

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