Electricity measuring equipments Questions and Answers

Example 23 31 When the switch is open in lowermost loop of a potentiometer the balance point length is 60 cm When the switch is closed with a known resistance of R 492 the balance point length decreases to 40 cm Find the internal resistance of the unknown battery

W 4 The output of the given circuit ww V sinot m 1 Would be zero at all times 2 Would be like half wave rectifier with positive cycle in output 3 Would be like a half wave rectifier with negative cycle in output

VT 70 V V 26 V R IT R R 25 Q IT A V Given the circuit above solve for IT Round your answer to the nearest 0 1 Do not include units Be VERY careful when rounding Keep all digits until you re ready to round your FINAL ANSWER

Camille takes her pocket calculator out of her book bag as she gets ready to do her physics homework In the calculator a 0 208 C charge encounters 15 2 0 of resistance every 2 2 seconds What is the potential difference of the battery

3 Use Superposition to determine the current through the 4 ohm resistor below B21202 480

Valerie s 209 W flat iron is plugged into a 120 V line in her bedroom What is the resistance of the flat iron when it is heated Don t include unit

3 A series combination of two resistors 6 0 Q and 10 0 Q is connected to a 9 00 V battery a Calculate the total resistance of the circuit and the current b What is the potential difference voltage across each resistor 4 A 7 00 resistor is connected in series with another resistor and a 4 5 V battery The current in the circuit is 0 E A Calculate the value of the unknown resistance

V broadcast antennas are the tallest artificial structures on Earth In 1987 a 74 kg physicist placed himself and 384 kg of quipment at the top of a 666 m high antenna to perform gravity experiments By how much was the antenna compressed if ve consider it to be equivalent to a steel cylinder 0 39 m in radius ound your answer to 5 decimal places

A plug-in transformer supplies 9.00 V to a video game system. (a) How many turns are in its secondary coil if its input voltage is 120 V and the primary coil has 383 turns? (b) What is its input current when its output is 1.13 A?

A clamp on ammeter is clamped on all three wires of a 120 volt circuit that is drawing 9.68 amps. What will the ammeter read as the total amperage? Select one: a. 0 A b. 4.84 A c. 19.36 A d. 21 A

In working of moving coil galvanometer (select the correct alternatives) Eddy current help in achieving equilibrium of coil faster. Cylindrical soft iron core helps in make magnetic field radial & increasing strength of torque on coil. Parallex error needs to minized while taking measurement. Marking on scale are equally spaced for equal change in current.