Part – A
- Define electric potential difference.
- Explain the function of conductor. In what forms is it used and where.
- Calculate the resistance of a 400 W bulb connected across 230 volts power line.
- What is the shunt resistance Rs needed to extend the range of 50Ω, 1-mA movement to 100 mA.
- If a rms voltage of 120 V is applied across a 100 ohms resistor. What would be its rms current?
- Show how two resistance A and B are connected in parallel across a battery
- What is magnetic saturation
- Calculate the capacitance of a capacitor with plate area of 50 cm2 and dielectric thickness of 0.5mm with air as dielectric
- What is the peak to peak value of a sine wave whose rms value is 10 volts
Part – B
- Describe frequency of an alternating voltage.
- The conductance of a wire at 100°C is one tenth its value at 25°C. If the wire resistance equals 10 ohms at 25°C. Calculate the resistance of the wire at 100°C.
- Explain the color coding for resistors. Also how the color coding determines the tolerance of resistor.
- A 60 volts source is connected across a 30 kilo-ohm resistance:
- Draw the schematic diagram
- How much current flows through the resistance?
- Give the color code of the resistance
- Define voltmeter.
- Explain the loading effect of the voltmeter.
- Use the method of mesh currents to solve for IR1 , IR2 , IR3 , VR1 , VR2 and VR3 in the circuit given below:
- Explain why the terminal voltage of a battery drops with more load current.
- Explain the main parts of the electric motors.
- Explain in brief lead-acid wet cell.
- A6 volt lead-acid battery has an internal resistance of 0.01 Ohm. How much current will flow if the battery has a short circuit?
- Explainable magnetic field.
- The flux density in an iron core is 0.5T if the area of the core is 10 cm2. Calculate the total number of flux lines in the core.
- What is meant by a dielectric material? Name four common dielectric materials where it is used.
- A microfarad capacitor C1 and a 10 microfarad capacitor C2 are in series with a constant 2 milli ampere charging current:
- After 4 seconds, how much charge is in C1 and in C2.
- How much is the voltage across C1 and across C2.
- Explain in brief about semiconductors,
- Define hole charge and hole current.
- Explain the concept of PN junction.
Attention : This exam questions are converted from
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