5. Find the peak current and resonant frequency of the following circuit (as shown in figure). 100 mH 100F (a) 2A and 100 Hz V = 30 sin 100t www. 120 (b) 2A and 50 Hz (c) 0.2A and 50 Hz (d) 0.2 A and 100 Hz 6. A tuning fork A of unknown frequency produces 5 beats/s with a fork of known frequency 340 Hz. When fork A is filed, the beat frequency decreases to 2 beats/s. What is the frequency of fork A? (a) 345 Hz (b) 338 Hz (c) 342 Hz (d) 335 Hz 7. An inclined plane making an angle of 30 with the horizontal is placed in a uniform horizontal electric field 200 as shown in the figure. A body of mass 1kg and charge 5 mC is allowed to slide N C down from rest at a height of 1m. If the coefficient of friction is 0.2, find the time taken by the body to reach E = 200N/C the bottom. 1 cos 30= g=9.8m/s; sin 30; cos 1kg, 5mC 2 30 (a) 1.3s (b) 0.46s (c) 2.3s (d) 0.92s E