Trắc nghiệm vật lý part 2 ppsx

... = 2sin( 2 t + 2 ). b, u = 2sin( 2 t - 4). c, u = 2sin( 2 t + 34). d, u = 2sin( 2 t - 3 4). e, u = 2sin( 2 t - 2 ). 27 d, Năng lượng e, Tất cả các đại lượng trên. 1 52. ... trong vùng giao thoa cách 2 nguồn khoảng d1, d 2 là: a, A = 2acosπ  12 dd  b, 2acosπ  12 dd  C, 2acos2π 12 dd  D, 2acos2π  12 dd e, 2acosπ  12 dd 161. Hai nguồn sóng ... đoạn d 2 . Để biên độ sóng tại M bằng 2a thì: a, d 2 - d1 = 2k 2  b, d 2 - d1 = (2k + 1) 2  c, d 2 - d1 = k 2  d, d 2 - d1 = k 4 e, d 2 - d1 = ( 2k + 1)...

... 2 s b/ 1 s c/ 1,5 s d/ 4 s e/ 2, 5 s 73. Một lò xo có đọ cứng k, được cắt làm 2 đoạn có chiều dài là l1 và l 2 với l1 = 2l 2 . độ cứng của 2 lò xo là a/ 2k ; 1k b/ 1,5k ; 3k c/ 4k ; 2k ...  2 t ( cm, s ) Vật qua vị trí cân bằng lần thứ 3 vào thời điểm: a/ 4,5 s b/ 2 s c/ 6 s d/ 2, 4 s e/ 1,6 s 29 . Vật dao động điều hòa có phương trình: x = 4sin  2 2t ... đại của vật nặng: a, 4 m/s 2 b, 6 m/s 2 c, 2 m/s 2 d, 5 m/s 2 e, 1 m/s 2 51. Con lắc lò xo khối lượng m = 500g dao động với phương trình x= 4sin10t ( cm, s ). Vào thời điểm t = 12 T. Lực...

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224 KxImXBGFAIV9mKwoTPn1swVrx/IC0YAwrhKltpzt8WjBUpC8aAQrjKVprztwVjRcqCMaAQFoyVZr8HBweXLVvW2tpaU1PjwBWRXC5XWVl533333XXXXY4GMI61a9e6ylaC/bZgrEi5lAUUIlwwdvLkSfcmF4...

... V e) 20 2 V 25 6. Đoạn mạch như hình vẽ ZL = 30  ZC = 25 ; UL= 60 V; f = 50 Hz Hiệu điện thế hiệu dụng hai đầu P, M là: a) 50 V b) 25 V c) 25 2 V d) 50 2 V e) 20 V 25 7. Đoạn ... trở mạch Z = 2 21CR . c) Công suất mạch P = RI 2 . d) Hệ số công suất mạch có giá trị nhỏ hơn một. e) U 2 = U 2 R+.U 2 C 21 6. Một đèn ống chấn lưu ghi 22 0V - 50Hz. Điều ... dụng hai đầu cuộn dây là: a) 20 V b) 28 ,2 V c) 28 V d) 28 2 V e) 20 0,5 V 24 8. Đoạn mạch xoay chiều như hình vẽ. L = 0,318 H C = 31,8 F R = 100  uAB = 20 0 sin 100 t (V) Ampe kế...

... thế hiệu dụng U = 22 0V, tần số f = 50 Hz. Tại t = 0, u = 22 0 V. Biểu thức uAB có dạng: a) u = 22 0sin (100t + 2 ) (V) b) u = 22 0 2 sin (100t +4) (V) c) u = 22 0 2 sin(100t +6) ... Hiệu điện thế mắc vào 2 đầu mạch u = 20 0 2 sin 100t (V). Biết I =Imax /2, tụ C có dung kháng bằng: 61 b) 25 0 ; 120 W d) 23 5 ; 120 W e) 20 0 ; 176 W 29 8. Đoạn mạch được nối ... độ tự cảm L bằng: a) R = 20 0 ; 1H b) R = 20 0; L =  2 H c) R = 22 0 ; L = 0,159 H d) R = 20 0; L =  2 1H e) Không tính được vì thiếu dữ liệu 29 2. Mạch điện gồm ống dây có...

... múi thì sức căng dây là 27 N. Nếu dây rung thành 3 múi thì sức căng dây là: a) 81 N b) 9 N c) 27 N d) 3 N e) 6 N 73 a )20 0 w b) 26 4 w c) 23 2 w d) 24 6 w e) 22 2 w 3 52. Để giống câu 351 trên. ... sáng có diện tích bằng: a) 0,5m 2 b) 0,6m 2 c) 0,84m 2 d) 1,5m 2 e) 0 ,25 m 2 504. Đặt mắt trên trục gương phẳng tròn có bán kính 0,2m và cách gương 0,2m. Chu vi vòng tròn giới hạn thị ... t(V) Cuộn dây thuần cảm. Các vôn kế là lý tưởng Khi: R = R0 thì Pmax, lúc này (V1) chỉ 20 0 V Số vôn kế (V2) là: a) 100 2 b) 100 V c) 20 0 2 V d) 20 0 V e) Không tính được vì thiếu dữ liệu...

... gương ta có hệ thức nào sau đây: a) a.b = 2 2f b) a.b = f 2 c) a 2 .b 2 = f d) a 2 .b 2 = 4 2 f e) Hệ thức khác 580. Gương cầu lõm bán kính 20 cm. Điểm sáng S chuyển động đều từ đỉnh gương ... bao nhiêu và là vật thật hay vật ảo. a) Vật thật, cách gương 24 cm b) Vật ảo, cách gương 24 cm d) Vật thật, cách gương 36cm d) Vật ảo, cách gương 36cm e) Đáp số khác 557. Vật AB vuông góc ... cao bằng vật. Biết vật AB cách gương 28 cm. Gương này là gương gì và có tiêu cự bằng bao nhiêu? Vật AB là vật gì? a) Gương cầu lõm, tiêu cự 28 cm, vật ảo b) Gương cầu lõm, tiêu cự 14cm. Vật thật...

... ảo và cách L 2 20 cm b) ảnh thật và cách L 2 20 cm c) ảnh thật và cách L 2 30cm d) ảnh ảo và cách L 2 40cm e) Đáp số khác 703. Cho hai thấu kính L1 (f1 = 25 cm) và L 2 (F 2 = 10cm) đặt ... A b) Sin 2 minDA= n sin 2 A c) Sin 2 minDA= 2 n sin A d) Sin min 2 DA= n sin 2 A e) Sin  2 minDA= n sin 2 A 6 42. Điều kiện để có tia ló đối ... cho ảnh cao gấp 2 lần vật. Vật và ảnh cách nhau một đoạn bằng: a) 20 cm b) 10cm c) 30cm d) 90cm e) 25 cm 6 82. Vật sáng AB đặt vuông góc với trục chính của thấu kính có tiêu cự 25 cm, qua thấu...

... vật kính 12cm b) Từ vô cực đến vật cách vật kính 24 cm. c) Từ vô cực đến vật cách vật kính 60cm. d) Từ vô cực đến vật cách vật kính 10cm. e) Chỉ chụp được vật cách vật kính 60cm. 725 . Vật kính ... đến vật cách mắt 21 0cm b) Từ vô cực đến vật cách mắt 21 cm c) Từ vô cực đến vật cách mắt 7,2cm d) Từ vô cực đến vật cách mắt 15cm e) Đáp số khác. 134796. Tìm khoảng cách từ vật đến vật kính ... a) 2cm b) 1,5cm c) 2, 5cm d) 3cm e) Đáp số khác 8 02. Kính thiên văn khi ngắm chừng ở vô cực có độ bội giác bằng 100. Khoảng cách giữa vật kính và thị kính lúc này bằng 20 2cm. Tiêu cự của vật...