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Answers
Answer:
Explanation:
Q1)i. Galvanometer
ii. Joules
iii. Voltmeter
Q2)i. William sturgeon
ii. Generator
Q3)i. Thermometer
ii. Fuse wire
Q4)i. Voltmeter
ii. Hz (Hertz)
Q5)i. Copper
ii. In this case, the washing machine that is rated 300 W is operated for 1 hr/day. The electric bill has to be calculated for the month of March. That is, the total number of hours the washing machine is operated in this month is 31 hours as this month has 31 days.
The total energy that is used by the washing machine in a day is given by the formula Q=Pt.
Here, the power is 300 W and the time used is 1 hour.
So, Q=300W×1h=300Wh=0.3 kWh
Therefore, the total number of kWh for a month is 0.3kWh×31=9.3 kWh
The cost of 1 kWh is given as Rs.3.
Hence, the total cost for a month is =9.3kWh×3=Rs.27.90
iii. r =p/i^2
r = 300/ (3^2)
r = 11.1
iv. A common type of short circuit occurs when the positive and negative terminals of a battery are connected with a low-resistance conductor, like a wire. Effect; With a low resistance in the connection, a high current will flow, causing the delivery of a large amount of energy in a short period of time.
v. When a current-carrying conductor is placed in an external magnetic field, the conductor experiences a force perpendicular to both the field and to the direction of the current flow. It was invented by John Ambrose Fleming.
Q6.
1. A wire coil partly surrounding an iron core. When current flows through the wire it produces an electromagnetic effect.
compare; The poles of a bar magnet are fixed and cannot be altered, whereas, the poles of a solenoid can be altered. ... The strength of the magnetic field of the bar magnet is constant, whereas, the strength of the magnetic field of the solenoid depends on the amount of the electric current passed through it.
Q7.
R=11.1Ω