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1

### GATE EE 2014 Set 1

Numerical
Figure (i) shows the circuit diagram of a chopper. The switch $$S$$ in the circuit in figure (i) is switched such that the voltage $${V_D}$$ across the diagram as the wave shape as shown in figure (ii). The capacitance $$C$$ is large so that the voltage across it is constant. If switch $$S$$ and the diode are ideal, the peak to peak ripple (in A) in the inductor current is ________. Correct answer is between 2.49 and 2.51
2

### GATE EE 2013

In the figure shown below, the chopper feeds a resistive load from a battery source. $$MOSFET$$ $$Q$$ is switched at $$250$$ $$kHz,$$ with a duty ratio of $$0.4.$$ All elements of the circuit are assumed to be ideal. The average source current in Amps in steady-state is

A
$$3/2$$
B
$$5/3$$
C
$$5/2$$
D
$$15/4$$
3

### GATE EE 2013

In the figure shown below, the chopper feeds a resistive load from a battery source. $$MOSFET$$ $$Q$$ is switched at $$250$$ $$kHz,$$ with a duty ratio of $$0.4.$$ All elements of the circuit are assumed to be ideal. The PEAK-TO-PEAK source current ripple in $$Amps$$ is

A
$$0.96$$
B
$$0.144$$
C
$$0.192$$
D
$$0.288$$
4

### GATE EE 2012

In the circuit shown, an ideal switch $$S$$ is operated at $$100$$ $$kHz$$ with a duty ratio of $$50%$$. Given that $$\Delta {i_c}$$ is $$1.6$$ $$A$$ peak-to-peak and $${{\rm I}_0}$$ is $$5 A$$ $$dc,$$ the peak current in $$S$$ is A
$$6.6$$ $$A$$
B
$$5.0$$ $$A$$
C
$$5.8$$ $$A$$
D
$$4.2$$ $$A$$
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