๐ก The work function of a metal is 4.5 eV. What is its threshold wavelength?
Anonymous Quiz
43%
2750 โซ
17%
3000 โซ
21%
3560 โซ
19%
4750 โซ
๐ How much current is drawn by the primary of an ideal transformer if it steps down 220 V to 22 V to operate a device with resistance 220 ฮฉ?
Anonymous Quiz
20%
0.01 A
43%
0.1 A
37%
1 A
0%
10 A
๐งโโ๏ธ A boy starts from rest at time t = 0, accelerates uniformly and travels 320 m in 4s. What is his velocity at time t = 10 s?
Anonymous Quiz
9%
200 m/s
65%
40 m/s
22%
400 m/s
4%
20 m/s
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100g of water is heated from 30ยฐC to 50ยฐC. Change in internal energy?
Anonymous Quiz
36%
8.4 kJ
34%
84 kJ
18%
2.1 kJ
11%
4.2 kJ
Angular momentum of projectile at max height projected at 45ยฐ?
Anonymous Quiz
21%
0
46%
(mvยณ)/(4โ2g)
25%
(mvยณ)/(โ2g)
7%
mโ(2ghยณ)