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An object 6cm high is placed 30cm in front of a convex mirror of focal length 15cm. Find the image position and determine it's height
A coil of radius 9cm and 45turns is 14cm long and has a current of 4.0A through it
1) calculate the self inductance of the coil
2) calculate the energy stored in the inductor
A rectangle coil of 50turns hangs vertically in a uniform magnetic field of magnitude 0.01T,so that the plan of the coil is parallel to the field.the mean height of the coil is 5cm and it's mean width is 2cm.calculate the strength of the current that must pass through the coil inorder to deflect it 30degree if the torsional constant of the suspension is 10(-19) N/m per degree
A coil of length 4cm and width 2cm and 45 turns is placed in a uniform field of flux density 0.8T. if the axis of the coil is at right angle to d magnetic field and has a current of 12A, calculate the turning moment on the coil
Prove that equivalent resistance R of other resistor R1 R2 R3...RN in series is given as
R= R1+R2+R3+...RN
If we have given three resistances, current and voltage...how we find the 4th resistance
During electric interruption, what is being lose? Is it the voltage source, electric current or electric resistance? Explain your answer.
A capacitor C1 is connected to a battery , the battery is removed another capacitor C2 is connected in parallel, (c1!=c2) wat is the charge q?
A resistance of 5ohms is connected in parallel with another of a 4ohm and the parallel arrangements is connected in series with a 2ohm resistor and an end of 20V. Calculate the potential difference and current across each resistor
- Give at least 5 sources of A.C.
- Give at least 5 sources of D.C.
