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qUESTIONS

Concepts-12th-MH

Equations of kinematics for linear and angular motion

Concepts-12th-MH

Kinematics of linear & angular motion

Concepts-12th-MH

Motion & its types

A mercury drop of radius 1.0 cm is sprayed in to 106 droplets of equal size. The energy expended in this process is (surface tension of mercury is equal to 32× 10-² Nm-¹ )

An alternating voltage is given by e = 6 sin 314 t. find (i) the peak value (ii) frequency (iii) time period and (iv) instantaneous value at time t = 2 ms

An alternating voltage given by e = 140 sin 3142 t is connected across a pure resistor of 50 Ω. Find (i) the frequency of the source (ii) the rms current through the resistor.

An inductor of inductance 200 mH is connected to an AC source of peak emf 210 V and frequency 50 Hz. Calculate the peak current. What is the instantaneous voltage of the source when the current is at its peak value?

A Capacitor of 2 μF is connected to an AC source of emf e = 250 sin 100πt. Write an equation for instantaneous current through the circuit and give reading of AC ammeter connected in the circuit.

A 100mH inductor, a 25 μF capacitor and a 15 Ω resistor are connected in series to a 120 V, 50 Hz AC source. Calculate (i) impedance of the circuit at resonance (ii) current at resonance (iii) Resonant frequency

A coil of 0.01H inductance and 1Ω resistance is connected to 200V, 50Hz AC supply. Find the impedance of the circuit and time lag between maximum alternating voltage and current.

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